In front of us and to the left was the end of the water column.

Let's assume that the water column in the glass is about 50 mm high.

But we're working the whole water column, which turns out to have the largest animal communities on earth.

For example, in a 10-meter water column, it can reach up to 2 meters below the surface.

They prefer to pick their food from the middle of the water column.

On the top and middle of the water column, it uses changes in the light that might look like food.

Around this type of structure, they are found throughout the water column.

But there is a new borderline: within the water column itself.

The remainder will then often sink to the bottom of the water column.

Rather, they spend their entire lives in the water column as plankton.